Half of my mesh/texture is blurred
You'll need to provide a proper UV map to make this work. The reason why it looks like this is that currently your UV map is stretching just horribly, check this screenshot:



When I select the bottom of the vase, I can see that those faces cover a very small area of the UV editor, causing the texture to stretch like it does:



In essence, 75% of the surface of the vase are mapped to something like 4% of the UV space. This just cannot work. Try unwrapping the vase by placing seams down the side on two opposite sides, and also around the n-gon on the bottom, then the unwrap function will give you something like this:



The vase then will receive the texture like this:



Check the Blender manual on UV unwrapping techniques for further information:
https://www.blender.org/manual/editors/uv_image/uv_editing/unwrapping/index.html